HK BFSIII binary trigger issue

This is the second binary trigger I have put together. But this one is giving me some trouble. Federal Arms recommended I use a stronger trigger spring due to an issue with surplus ammo so I did use a different spring. But otherwise everything is normal otherwise and it will not go into safety when the charge handle is not pulled back.

I am not a master tech so just wondering what I can do to tech the issue?

I'd look at how the BFS group fits in your trigger housing. I had to fuss with it to get it to work properly in an HK SP5k. I used an MP5k housing, which I had to modify slightly taking some material out to get the trigger pack to fit low enough into the housing to properly engage the bolt group.

On second thought. Return it and get your money back. They suck even when they work correctly.

I'd look at how the BFS group fits in your trigger housing. I had to fuss with it to get it to work properly in an HK SP5k. I used an MP5k housing, which I had to modify slightly taking some material out to get the trigger pack to fit low enough into the housing to properly engage the bolt group.

On second thought. Return it and get your money back. They suck even when they work correctly.

Too funny.
Yeah I would not want to use it with rounds, primarily for blanks. The issue is in or out of the trigger housing.